Towards an enhanced fatigue evaluation of bituminous mortars

Margaritis, Alexandros; Pipintakos, Georgios; Varveri, Aikaterini; Jacobs, Geert; Hasheminejad, Navid; Blom, Johan; Bergh, Wim van den

doi:10.1016/j.conbuildmat.2020.121578

Cited by 14 publications

(13 citation statements)

References 38 publications

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“…The fatigue resistance of mortars was further evaluated using the energy concepts of DER and RDEC. In an earlier study concerning the fatigue characterisation of mortars, it was found that the DER approach led to a fatigue model that was independent of temperature but dependent on the bitumen type (modified or not) [ 23 ]. Figure 11 presents the result of the DER approach for the studied mortar samples.…”

Section: Resultsmentioning

confidence: 99%

“…An enriched composition means that the mortar mixtures have more bitumen than the actual mortar phase in the bulk. The procedure to calculate the enriched composition, as well as the fabrication steps of mortar mixes, are elaborately discussed and presented in a previous study [ 23 ]. Finally, it must be noted here that the proposed fabrication method aims to minimise the air voids in the mortar sample.…”

Section: Methodsmentioning

confidence: 99%

“…For the evaluation of the fatigue resistance of bituminous mortars, a newly proposed sample geometry was utilised [ 23 ]. The mortar sample geometry consists of three parts, namely two half one-sheeted hyperboloids, both approaching the diameter of a cylindrical middle part.…”

Section: Experimental Investigationmentioning

confidence: 99%

“…For each mortar mix, 17 to 24 samples were tested. More information concerning the fatigue testing framework, the used geometry, and fabrication procedure are presented in a previous study [ 23 ].…”

Section: Experimental Investigationmentioning

confidence: 99%

“…For the mortar samples, the DE per cycle was calculated using Equation (2), taking into account the shear stress (τ) instead of the normal stress (σ). In a previous study, it was demonstrated that the energy parameter PV correlated well with all failure moments N f50 , N f,G*xC , and N p20 , which provided a unique fatigue model, with the best fit being achieved for the model between PV and N p20 [ 23 ].…”

Section: Experimental Investigationmentioning

confidence: 99%

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Fatigue Resistance of Bituminous Mixtures and Mortars Containing High Reclaimed Asphalt Content

et al. 2020

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With the increased use of reclaimed asphalt (RA), the ability of bituminous materials to resist fatigue cracking may face a decline mainly due to the aged reclaimed asphalt binder (RAB), especially when RA is used at higher rates and not sufficiently treated. In this study, the bulk scale (asphalt) and its subscale (mortar) were employed to evaluate the effect on fatigue resistance when a RAB is added, by considering three replacement rates: 0%, 40%, and 70% RAB. The fatigue testing of asphalt mixtures was carried out using a four-point bending (4PB) setup, while the mortars were tested using a new column-like geometry utilising a dynamic shear rheometer (DSR). The fatigue properties were further analysed using dissipated energy concepts. The aim of this study was, first, to assess whether the inclusion of a RAB can provide at least similar fatigue properties compared to an all-virgin mix, and second, to evaluate whether the proposed treatment is beneficial for the mixtures with a RAB. The asphalt tests revealed that the inclusion of a 40% RAB led to increased fatigue resistance, whereas the mortar tests showed that the inclusion of RAB has an inverse effect on fatigue life.

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Experimental Investigationmentioning

confidence: 99%

Section: Experimental Investigationmentioning

confidence: 99%

Section: Experimental Investigationmentioning

confidence: 99%

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